基于CPLD的信号产生电路及其可靠性处理

基于CPLD设计了一种串行数据控制的导弹指令信号产生电路，介绍了电路的实现原理，重点研究了电路的可靠性问题。通过附加D触发器和改变触发时钟消除了电路中的竞争干扰；通过非有效数据剔除、起始位确认、波特率防抖等措施消除了串行数据中的干扰和误码；引人大环路反馈电路，以计数器的可靠归零控制复位信号的释放，实现了电路的可靠复位；引入有效脉冲确认电路，消除了信号边沿的窄脉冲干扰，并实现了脉冲宽度的量化。实践表明，这些措施有效消除了电路及串行接收数据中的干扰，从而在检测系统中实现了稳定、可靠的导弹指令信号激励。

CPLD based signal generating circuit and its reliability processing

Based on CPLD,the paper designs a missile instruction signal generating circuit controlled by serial data. Its implement principle is introduced and reliability problems are researched in detail. The competitive interferences are eliminated By means of additional trigger and changing trigger clock;the interferences and error codes are avoided in serial data by the measures such as non-effectual data removing,start-bit ensuring,baud rate shake preventing;the whole circuit's reset is ensured by introducing la...